Added copy_if_different for eager code generator (#38562)

paddle/fluid/eager/auto_code_generator/CMakeLists.txt

@@ -16,6 +16,15 @@ execute_process(
     COMMAND "${PYTHON_EXECUTABLE}" "${PADDLE_SOURCE_DIR}/paddle/fluid/eager/auto_code_generator/generate_file_structures.py" "${PADDLE_SOURCE_DIR}/paddle/fluid/eager/"
 )
 
+set(tmp_dygraph_forward_h_path "${PADDLE_SOURCE_DIR}/paddle/fluid/eager/api/generated/fluid_generated/dygraph_forward_api.tmp.h")
+set(tmp_dygraph_forward_cc_path "${PADDLE_SOURCE_DIR}/paddle/fluid/eager/api/generated/fluid_generated/forwards/dygraph_forward_functions.tmp.cc")
+set(tmp_dygraph_node_h_path "${PADDLE_SOURCE_DIR}/paddle/fluid/eager/api/generated/fluid_generated/nodes/nodes.tmp.h")
+set(tmp_dygraph_node_cc_path "${PADDLE_SOURCE_DIR}/paddle/fluid/eager/api/generated/fluid_generated/nodes/nodes.tmp.cc")
+set(dygraph_forward_h_path "${PADDLE_SOURCE_DIR}/paddle/fluid/eager/api/generated/fluid_generated/dygraph_forward_api.h")
+set(dygraph_forward_cc_path "${PADDLE_SOURCE_DIR}/paddle/fluid/eager/api/generated/fluid_generated/forwards/dygraph_forward_functions.cc")
+set(dygraph_node_h_path "${PADDLE_SOURCE_DIR}/paddle/fluid/eager/api/generated/fluid_generated/nodes/nodes.h")
+set(dygraph_node_cc_path "${PADDLE_SOURCE_DIR}/paddle/fluid/eager/api/generated/fluid_generated/nodes/nodes.cc")
+
 if(WIN32)
     set(EAGER_CODEGEN_DEPS eager_generator)
     if("${CMAKE_GENERATOR}" STREQUAL "Ninja")
@@ -48,6 +57,14 @@ if(WIN32)
 
     add_custom_target(eager_codegen
       COMMAND "${eager_generator_path}/eager_generator.exe" "${PADDLE_SOURCE_DIR}/paddle/fluid/eager/api/generated/fluid_generated"
+      COMMAND ${CMAKE_COMMAND} -E copy_if_different ${tmp_dygraph_forward_h_path} ${dygraph_forward_h_path}
+      COMMENT "copy_if_different ${tmp_dygraph_forward_h_path} to ${dygraph_forward_h_path}"
+      COMMAND ${CMAKE_COMMAND} -E copy_if_different ${tmp_dygraph_forward_cc_path} ${dygraph_forward_cc_path}
+      COMMENT "copy_if_different ${tmp_dygraph_forward_cc_path} to ${dygraph_forward_cc_path}"
+      COMMAND ${CMAKE_COMMAND} -E copy_if_different ${tmp_dygraph_node_h_path} ${dygraph_node_h_path}
+      COMMENT "copy_if_different ${tmp_dygraph_node_h_path} to ${dygraph_node_h_path}"
+      COMMAND ${CMAKE_COMMAND} -E copy_if_different ${tmp_dygraph_node_cc_path} ${dygraph_node_cc_path}
+      COMMENT "copy_if_different ${tmp_dygraph_node_cc_path} to ${dygraph_node_cc_path}"
       DEPENDS ${EAGER_CODEGEN_DEPS}
       VERBATIM)
 else()
@@ -55,6 +72,14 @@ else()
           COMMAND ${CMAKE_COMMAND} -E env "LD_LIBRARY_PATH=$ENV{LD_LIBRARY_PATH}:${CMAKE_CURRENT_BINARY_DIR}/../../pybind"
                 "${CMAKE_CURRENT_BINARY_DIR}/eager_generator" 
                 "${PADDLE_SOURCE_DIR}/paddle/fluid/eager/api/generated/fluid_generated"
+          COMMAND ${CMAKE_COMMAND} -E copy_if_different ${tmp_dygraph_forward_h_path} ${dygraph_forward_h_path}
+          COMMENT "copy_if_different ${tmp_dygraph_forward_h_path} to ${dygraph_forward_h_path}"
+          COMMAND ${CMAKE_COMMAND} -E copy_if_different ${tmp_dygraph_forward_cc_path} ${dygraph_forward_cc_path}
+          COMMENT "copy_if_different ${tmp_dygraph_forward_cc_path} to ${dygraph_forward_cc_path}"
+          COMMAND ${CMAKE_COMMAND} -E copy_if_different ${tmp_dygraph_node_h_path} ${dygraph_node_h_path}
+          COMMENT "copy_if_different ${tmp_dygraph_node_h_path} to ${dygraph_node_h_path}"
+          COMMAND ${CMAKE_COMMAND} -E copy_if_different ${tmp_dygraph_node_cc_path} ${dygraph_node_cc_path}
+          COMMENT "copy_if_different ${tmp_dygraph_node_cc_path} to ${dygraph_node_cc_path}"
           DEPENDS eager_generator
           VERBATIM)
 endif()

paddle/fluid/eager/auto_code_generator/eager_generator.cc

@@ -1847,19 +1847,15 @@ static std::string GenerateDygraphHFileIncludes() {
   return dygraph_forward_api_includes_str;
 }
 
-static void GenerateForwardHFile(const std::string& output_dir,
+static void GenerateForwardHFile(const std::string& dygraph_forward_api_path,
                                  const std::string& dygraph_forward_api_str) {
-  std::string dygraph_forward_api_path = output_dir + "/dygraph_forward_api.h";
   std::ofstream forward_header_stream(dygraph_forward_api_path, std::ios::out);
   forward_header_stream << dygraph_forward_api_str;
   forward_header_stream.close();
 }
 
-static void GenerateForwardDygraphFile(const std::string& output_dir,
+static void GenerateForwardDygraphFile(const std::string& forward_cc_path,
                                        const std::string& fwd_function_str) {
-  std::string forwards_dir = output_dir + "/forwards/";
-  std::string forward_cc_filename = "dygraph_forward_functions.cc";
-  std::string forward_cc_path = forwards_dir + forward_cc_filename;
   const char* FORWARD_INCLUDE_TEMPLATE =
       "#include "
       "\"paddle/fluid/eager/api/generated/fluid_generated/"
@@ -1876,11 +1872,8 @@ static void GenerateForwardDygraphFile(const std::string& output_dir,
   forward_cc_stream.close();
 }
 
-static void GenerateNodeHFile(const std::string& output_dir,
+static void GenerateNodeHFile(const std::string& node_h_path,
                               const std::string& grad_node_str) {
-  std::string nodes_dir = output_dir + "/nodes/";
-  std::string node_h_filename = "nodes.h";
-  std::string node_h_path = nodes_dir + node_h_filename;
   std::string node_h_include_str =
       "#pragma once\n"
       "#include \"paddle/fluid/eager/tensor_wrapper.h\"\n"
@@ -1892,11 +1885,8 @@ static void GenerateNodeHFile(const std::string& output_dir,
   node_h_stream.close();
 }
 
-static void GenerateNodeCCFile(const std::string& output_dir,
+static void GenerateNodeCCFile(const std::string& node_cc_path,
                                const std::string& grad_function_str) {
-  std::string nodes_dir = output_dir + "/nodes/";
-  std::string node_cc_filename = "nodes.cc";
-  std::string node_cc_path = nodes_dir + node_cc_filename;
   const char* NODE_CC_INCLUDE_TEMPLATE =
       "#include \"glog/logging.h\"\n"
       "#include \"paddle/pten/api/all.h\"\n"
@@ -2026,18 +2016,24 @@ static void DygraphCodeGeneration(const std::string& output_dir) {
   }
 
   VLOG(6) << "-------- GenerateDygraphForwardCCFile -------";
+  std::string forward_cc_path =
+      output_dir + "/forwards/dygraph_forward_functions.tmp.cc";
   fwd_function_str += "\n";
   fwd_function_str += GenerateCoreOpsReturnsInfo();
-  GenerateForwardDygraphFile(output_dir, fwd_function_str);
+  GenerateForwardDygraphFile(forward_cc_path, fwd_function_str);
 
   VLOG(6) << "-------- GenerateForwardHFile -------";
-  GenerateForwardHFile(output_dir, dygraph_forward_api_str);
+  std::string dygraph_forward_api_path =
+      output_dir + "/dygraph_forward_api.tmp.h";
+  GenerateForwardHFile(dygraph_forward_api_path, dygraph_forward_api_str);
 
   VLOG(6) << "-------- GenerateNodeHFile -------";
-  GenerateNodeHFile(output_dir, grad_node_h_str);
+  std::string node_h_path = output_dir + "/nodes/nodes.tmp.h";
+  GenerateNodeHFile(node_h_path, grad_node_h_str);
 
   VLOG(6) << "-------- GenerateNodeCCFile -------";
-  GenerateNodeCCFile(output_dir, grad_node_cc_str);
+  std::string node_cc_path = output_dir + "/nodes/nodes.tmp.cc";
+  GenerateNodeCCFile(node_cc_path, grad_node_cc_str);
 }
 
 static void PrepareAttrMapForOps() {